Permutation-lock



(No Model.) I

B. J. DOUDS. v

PERMUTATION LOCK.

No. 431,451 Patented July 1,1890.

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UNITED STATES PATENT OFFICE.

BYRON J. DOUDS, OF KENT, OHIO.

PERMUTATlON-LOCK.

SPECIFICATION forming part of Letters Patent No. 431,451, dated July 1, 1890.

Application filed November 18, 1889- Serial No. 330,707- (No model.)

permutation-locks, and is designed as an improvement on a lock for which United States Letters Patent No. 396,273 were granted to me January 15, 1 889, and to which reference is hereby made.

The improvement consists, essentially, in a movable stop connected with the cam-disk, such stop constituting the starting-point from which the combinations are counted, and by shifting this stop to other predetermined points of the cam-disk the combinations of the lock are thereby changed. The theory of the lock described in the aforesaid patent involves a rotating disk having on the one face thereof a series of (imaginary) concentricpaths, in which a pin operates, the pin being connected with a vibrating lever, with cams on the face of the disk for engaging such lever-pin for deflectlng the same from one path to another, the arrangement of cams being such that commencing at a given stop or starting point and turning the cam-disk first in the direction away from such starting-point and then turnng the disk backward and forward according to the combination of the cams the leverpln will be deflected from one concentric path to another and will eventually find its way into the extreme inner or outer path, usually the latter, where cams are arranged to engage the pin, and thereby shift the lever to the extreme of its throw, such extreme movement of the lever being utilized, for instance, in the aforesaid patent in withdrawing the bolt. In other casesfor instance, where the bolt is operated by a knob-spindlethe extreme movement aforesaid of the vibrating lever is utilized in shifting a tumblerfor looking and unlocking the bolt mechanism, such latter appliance of locking-tumbler having been made the subject of application for Letters Patent bearing even date herewith. The

lock described in the aforesaid patent, together with various subsequent modifications thereof, is largely used, for instance, on doors of dwellings, stores, ($50., and on office-desks, and for various other purposes where it is necessary for some servant, clerk, or other confidential employ to be intrusted with the knowledge of the combination, and in case such employ should be discharged it would be at least desirable to change the combination. For this purpose I employ a movable stop or starting-point, with provisions at predetermined points on the cam-disk for attaching the stop. The stop preferably consists of a small stud, the cam-disk having diiferent sorew-threaded holes for receiving the stud, and by changing the stud from one hole to another the combination of the lock is changed.

In the accompanying drawings the figure shows an outline of the face of the cam-disk, with different holes therein for receiving the stop that constitutes the starting-point.

A represents the cam-disk, and B the vibrating lever, the latter having a pin 1), that is successively engaged by the different cams on the disk, while the latter is being rotated in the one direction or the other.

C is a stop constituting the starting-point in computing the combinations of the look. This stop is preferably a small stud operated by a screw-driver.

Disk A is provided with a series of screwthreaded holes located at different points-for instance at c 0 c &c.each hole being adapted to receive stud O. The cams on the disk are arranged in diiferentcombinations, commencing, respectively, at the different holes as starting-points, but each combination leading to (preferably) the outside path-for instance at a, where cams are located for givin g an extreme movement to the vibrating lever, such extreme movement of the lever being utilized for various purposes, as aforesaid.

WVhen it is desired to change the combination of the lock, stud C is changed to another hole, in which case a person knowing only the previous combination will have no advantage over a novice in attempting to open a look.

What I claim is In a permutationdock, the combination ,with rotating cam-disk and vibrating lever, the

disk having different combinations of cams In testimony whereof I sign this specificafor shifting the lever, of a movable stop eon tion,in the presence of two Witnesses, this 14th IO stitnting the starting-point in computing the day of May, 1889.

combinations, provisions being had on the cam-disk for shifting the stop from one point BYRON DOUDS' to another to serve as starting-points sucoes- Witnesses:

sive-ly for the different combinations of the F. E. POISTER,

look, substantially as set forth. GEO. 0. RICE. 

